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    <title>Document</title>
    <style>
      .xxx {
        color: red;
      }
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  <body>
    <div id="root"></div>

    <script src="./js/react.development.js"></script>
    <script src="./js/react-dom.development.js"></script>
    <script src="./js/babel.min.js"></script>

    <script type="text/babel">
      let age = 19
      // const div = (
      //   <div>
      //     {age >= 18 ? <h1>海静喜欢的电影</h1> : <h1>未成年看的动画片</h1>}
      //   </div>
      // )
      let flag = true
      const div = (
        <div>
          {/*{flag ? <h1>海静是一个lsp</h1> : ''}*/}
          {flag && <h1>海静是一个lsp</h1>}
        </div>
      )
      ReactDOM.render(div, document.getElementById('root'))
    </script>
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